diff --git a/date.field.inc b/date.field.inc
index 7aef97b..cc1b1cd 100644
--- a/date.field.inc
+++ b/date.field.inc
@@ -18,6 +18,7 @@ function date_field_formatter_info() {
         'multiple_number' => '',
         'multiple_from' => '',
         'multiple_to' => '',
+        'multiple_relative' => 0,
         'fromto' => 'both',
         'show_remaining_days' => FALSE,
       ),
diff --git a/date.module b/date.module
index e667b5d..d96038d 100644
--- a/date.module
+++ b/date.module
@@ -533,21 +533,39 @@ function date_prepare_entity($formatter, $entity_type, $entity, $field, $instanc
   // Otherwise removed values that should not be displayed.
   if (!empty($options['multiple_from']) || !empty($options['multiple_to']) || !empty($max_count)) {
     $format = date_type_format($field['type']);
-    include_once drupal_get_path('module', 'date_api') . '/date_api_sql.inc';
-    $date_handler = new date_sql_handler($field);
-    $arg0 = !empty($options['multiple_from']) ? $date_handler->arg_replace($options['multiple_from']) : variable_get('date_min_year', 100) . '-01-01T00:00:00';
-    $arg1 = !empty($options['multiple_to']) ? $date_handler->arg_replace($options['multiple_to']) : variable_get('date_max_year', 4000) . '-12-31T23:59:59';
-    if (!empty($arg0) && !empty($arg1)) {
-      $arg = $arg0 . '--' . $arg1;
-    }
-    elseif (!empty($arg0)) {
-      $arg = $arg0;
+    $range = FALSE;
+    if (empty($options['multiple_relative'])) {
+      // Use ISO 8601 notation: http://en.wikipedia.org/wiki/ISO_8601#Week_dates
+      include_once drupal_get_path('module', 'date_api') . '/date_api_sql.inc';
+      $date_handler = new date_sql_handler($field);
+      $arg0 = !empty($options['multiple_from']) ? $date_handler->arg_replace($options['multiple_from']) : variable_get('date_min_year', 100) . '-01-01T00:00:00';
+      $arg1 = !empty($options['multiple_to']) ? $date_handler->arg_replace($options['multiple_to']) : variable_get('date_max_year', 4000) . '-12-31T23:59:59';
+      if (!empty($arg0) && !empty($arg1)) {
+        $arg = $arg0 . '--' . $arg1;
+      }
+      elseif (!empty($arg0)) {
+        $arg = $arg0;
+      }
+      else {
+        // Use php relative dates:
+        // http://php.net/manual/en/datetime.formats.relative.php
+        $from = !empty($options['multiple_from']) ? $options['multiple_from'] : variable_get('date_min_year', 100) . '-01-01T00:00:00';
+        $to = !empty($options['multiple_to']) ? $options['multiple_to'] : variable_get('date_max_year', 4000) . '-12-31T23:59:59';
+        $range[0] = new DateObject($from, date_default_timezone());
+        $range[1] = new DateObject($to, date_default_timezone());
+      }
+      $range = $date_handler->arg_range($arg);
     }
-    elseif (!empty($arg1)) {
-      $arg = $arg1;
+    else {
+      // Use php relative dates:
+      // http://php.net/manual/en/datetime.formats.relative.php
+      $from = !empty($options['multiple_from']) ? $options['multiple_from'] : variable_get('date_min_year', 100) . '-01-01T00:00:00';
+      $to = !empty($options['multiple_to']) ? $options['multiple_to'] : variable_get('date_max_year', 4000) . '-12-31T23:59:59';
+      $range[0] = new DateObject($from, date_default_timezone());
+      $range[1] = new DateObject($to, date_default_timezone());
     }
-    if (!empty($arg)) {
-      $range = $date_handler->arg_range($arg);
+
+    if (!empty($range)) {
       $start = date_format($range[0], $format);
       $end = date_format($range[1], $format);
       // Empty out values we don't want to see.
diff --git a/date_admin.inc b/date_admin.inc
index b800201..bf1964b 100644
--- a/date_admin.inc
+++ b/date_admin.inc
@@ -80,7 +80,19 @@ function date_default_formatter_settings_form($field, $instance, $view_mode, $fo
     '#default_value' => $settings['multiple_to'],
     '#weight' => 4,
     '#access' => ($field['cardinality'] == FIELD_CARDINALITY_UNLIMITED) || ($field['cardinality'] > 1),
-    '#description' => t('Identify specific start and/or end dates in the format YYYY-MM-DDTHH:MM:SS, or leave blank for all available dates.'),
+    '#description' => t('Identify specific start and/or end dates in the format YYYY-MM-DDTHH:MM:SS, leave blank for all available dates or use one of the following notations:'),
+  );
+
+  $form['multiple_relative'] = array(
+    '#type' => 'radios',
+    '#size' => 15,
+    '#default_value' => (int) !empty($settings['multiple_relative']),
+    '#weight' => 4,
+    '#access' => ($field['cardinality'] == FIELD_CARDINALITY_UNLIMITED) || ($field['cardinality'] > 1),
+    '#options' => array(
+      0 => t('Use <a href=="http://en.wikipedia.org/wiki/ISO_8601#Week_dates">ISO 8601</a> notation.'),
+      1 => t('Use php <a href=="http://php.net/manual/en/datetime.formats.relative.php">relative dates </a> notation.'),
+    ),
   );
 
   $form['show_remaining_days'] = array(